Power press



Jan. 0, 1925.

W. R. FOX

POWER PRESS Filed Feb.

7, 1924 3 Sheets-Sheet 2 :L l l l I I ll lull gnoentozf Zilliam B1 321mw agf;

W. R. FOX

POWER PRESS Filed Feb.

3 Sheets-Sheet 5 lizvenior:

(0&4 MULW Aiifya'.

Patented Jan. 2%, 1925.

PATENT QFFICE.

WILLIAIE B. FOX, F JACKSON, MIGHIGAN, ASSIG-NOIR TO. FOX MACHINECOMPANY, OF JACKSON, MICHIGAN, A CGRPORATION OF- MICHIGAN.

BOVVER PRESS.

Application filed February 7, 1924. Serial No. 691,280.

T0 011/ who! it may concern:

Be it known that 1, YVILLIAM R. Fox a citizen of the United States, andresident of Jackson. in the county of Jackson and State oi Michigan.have invented certain new and useful improvements in Power Presses, ofwhich the following is a specification.

The invention concerns a power press haw ing a non-rotary reciprocatoryrain operated by planetary gearing under control of the operator toimpart different degrees of power to the rain according to the work tobe done.

Figure 1 is a side elevation of a ton press.

Fig. 2 is a part side elevation and part sectional of the head of a 10ton press as shown on Fig. 1 with a port-ion of the rain shown insection.

Fig. 3 is a sectional view of the head of 0 the 10 ton press on linea1.r of Fig. 2, the

gearing train being laid out flat on said line .r-.r Fig. 2 forconvenience of illustration.

Fig. 4 is a side elevation of a. portion of the head of'a 10 ton pressshown in Fig. 1 with the-cover removed showing the brake drums,

the brake hands and a. portion of the planetary gears.

Fig. 5 the base of a 10 ton press.

F ig. 6, the column of a. 10 ton press.

Fig. 7 is a central vertical section of the base and column.

Referring to the different figures, 1 is the base. 2 the column. 3 thehead, 4 the rain, in which are cuttherack teeth, 5 is'the rack pinionwhich carriesthe rack pinion gear-6. This'is driven by the pinion T onshaft 7*. Keyed to shaft 7 is the driven gear 8. This gear is driven bythe planetary gear 9 of which there are three sets. Secured to planetarygear 9 is the driving planetary gear 10. These gears are eitherriveted.to get-her or preferably made of one piece and are carried onthe three studs (141:) one only of which is shown in Fig. 3 and oneinFig. In the latter figure. however. the three gears 10 are indicated.

These studs are riveted into theloullgear wheel 12 and of course revolvewith it. The hull gear 12 is driven'hy the pinion 13 which is carried bythe drive shaft 15 that is driven by the pulley 16. Means areprovided-t-o impart motion from the hull gear wheel 12. through theplanetaries and gear '8 to the shaft Tand thence through the pini m 7.gear 6, .and pinion 5 to the ram 4 and this means is under control ofthe operator so that more or less of the bull wheels motion will heimparted to the rain. For this purpose a drum 1?, of which there may beone or more, is mounted to turn freely on an extension of the shaft T lcwhich the gear 8 is keyed.

If there are two or more drums they are fastened together in anysuitable way as by the pins 1?. This drum 17 has gear teeth 11 formed onits hub portion with which hub gear the planetary gear section 10ineshes.

There may he, as stated, one or more brake drunrs 1'7 and bands 18. Inthe five ton press there is one, in the 10 ton press there are two.

These brake bands are compressed each by a rod 17. These rods passthrough the hollow studs 18 which are secured to the casing by the nuts19. The ends of these studs 18 support one side of the brake band at 20,Fig. 4. The rods 17 support springs 21 which force the brake bandapart.The ends of the rods 17 are threaded into the nuts 22 which serve todraw the brake hands together.

A bell crank lever 23 is pivoted at 24 ,and its npperend contacts withthe plate 25 througlji which the rods 17 pass.

A foot .t-readle 26 is fulcrunied at 27. The connecting rod 28 connectsit with the hell crank 23. 'There is a turn buckle .29 which adjusts thelength .of this connecting rod andaspring 30 which holds it in theupward position. an adjustable stop 26 liniits .the

upward movement of the tread le.

The rain 4 has teeth out on a sufiicientpor- :tion of its length to give:11: the neces ary travel. On the upperQe-nd of ,the rain there is ashoulder turnedat Qveiythisshonlderis titted apiece .ofpipe iin spring33 1SQZIIIIGC1QD the outside of the p1pe82. This springat its lowerendpresses on the top of the head and on the upper endcontaets against ashouldered nut plate .34.

, A fholt .35 has itslower e 1d;sc1 :ewed;into the top of rain at. 36 and, its. upper. end. screwed into the flanged nut at 37. .This holdsthespring undersufficient compression toovereoine the weight. of the ramand. the .frietionof the gearing so that when the,ranris released atthebottom of the.stroke.it.1noves .quickly to th e high est. positionallowed. 1

l r ..diameterrir i 1s t reade in the plate 39 which plateisscrewed ontothe top ofthe head 3.

Onto the top of the pipe 38 is screwed a cap 40. This cap is threadede641 to fit a 'splined screw- 42. This screw at itsfllower .end ispinned securely to a large disc 43- which has a recess in its lower facewhich is filled with a rubber bumper 44-.

The cap 40 carries within it' a gear and pinion 45, 46. The gear 45 issplined to and turns the screw 42. This gear is driven by the pinion 46whichis pinned to the'sh'aft 4? which is conneeted by tuiixeisal ,jointto the hand'wheel shaft 48 so that by turning the handwheel 49 therubber bumper or stop is raised or lowered which limits the upwardtravel of the ram.

As the chamber surrounding the plane-- tary gears is filled with oil, itis'necessary to preven'tthe 011 from running out through the bearingaround the pinion shaft5. It'

is necessary,'therefore,to close the end of v the bearing in which theshaft revolves.

This -is;.done b placing a -cap 5O tight in the opening W ich preventsthe oil from passing out around this shaft.

V the-base of the machine at the rear." .The

belt from this motordrives up to the pulley 16.

v v The shaft 15 of pulley 16'revolves in bear ings which are carried inthe sleeve 51.1. This sleeve is pressed into the head casing and-[issecured ,at'52 by bolts which screw into theframe and'arecountersunkinto the flange at this po1nt,

The pulley guard 53 isoarric-d on the ex- .tensionof the sleeve. 51 at54. It isheld 'adjustably on this extension so that it can be revolvedto permit the opening for the- Ibelt to come indesired position, theopening being in the direction o'f'the motor for a I motordrive ordirectly overhead for a drive from an overhead shaft;

The outside bearing] 55 is carriedv in the plate 56 which is secured tothe outside of the pulley guard.

, Supporting c0Zum'n.As will be observed from Fig. 6 the column 2 istriangular in form and the boltswhich secure the three parts 1, 2, and3together pass belowthe top .'of the base. far enough'to' come. belowthe trussed section which gives the necessary strength at the base/anda. similar construction where the bolts passthrough the head, thesebolts being expanded by heat when they a'reput into position so thatwhen they; shrink they tie the three parts together in;

almost a solid unit and at'the same'time reduce the cost of constructionandadm-it of difierent lengths of columns to accommodate differentvarieties eof'work.

In the operation of the machine when it is 7 running idle, the gear1 3revolvesthe bull wheel '12"'there"being' nofriction' :on the 'ievolvingg revolve around thefhub gear 11 and while gear 10 which has 36 teen of3 to 1. 7, Consequently the'ratio reduction drum 17. Both the hasegearst, 1e?

and the brake drums revolve with gear 12 and the planetaries, 9, 1Q,simply roll around the. gear 8 without driving it,fbut

as soon as there is frictlon applied to that brake drums holding the hubgear 11 from then the planetary gears 9 and 10 making one completerevolution the gear 9 being smaller in "diameter than thegear 10,

fies theftliri gear 8 on shaft 7 which has 2-( teeth;

brake drums are stationary, gear 12 in making 15,0 revolutions wnlyrevolutions.

gear 8 and the shaft; 1

. 7 so brake drum gear llhas 18- It V [will be observed therefore, thatwhen the} l that'fth *bull' drive the driven-gear 8 and the shaft 5 thissystei'n 'ofgearing we get a resduction of 27 to 1, from the pulley tothe rackpinion shaft as foflows 1, The gear 13 g has 24 teeth, the gear12, 72" teeth.- f This is a-ratio of3'to 1. Y

' The ratio in the gears as explained is 343011.; Thep has 15teeth andthe gear 6 45 teetilr,

planetary ion is 2'? to l with the yieldingpressurc asde scribed.

When ashaft to'be straightened or a bushing to' be. forced into place ora piece to be broached, the pressl'ire applied to the.

foot lever stopstherotation of the brake drums and the ram immediatelydescends until it contacts with i the work to l be "per formed. If thepressure is light, the rain travels at the fixed speed untilthefootleveii .is.'.. released, or, the drums slip under the brake bands.If the pressure required to bend a shaft or to press in bushingis'slightthen the operator will ease off on the 'lever'giving justsufiicient pressure to'ac oomplish the work. As soon as the foot israised from the lever-,1 the brake bands are i released and the springforces the ram to its upper position, unless the operator again puts hisfoot on the treadle and starts theram moving downward as at first. I

the. use of presses "for V straightening, breaching or pressinglinbushings, it is often necessary-to holdthe pressure at about the maximumcapacity orjat some pressure less than the maximum capacity of thepressand fw'hen the pressure is held it is necessary that the brake drums beallowed to slip under tl1e' bands.- This" can be readily. .ACCOHP.

plished'in this press,- as they",areysubme jged alt) in oil and thepressure applied to the brake bands to give the necessary pressure tothe ram does not cause undue friction or heating when the pressure is soheld.

It will he noticed that the power press is generally of C form, that isto say, there is a base, a column set back from the front edge of thebase, and a head supported at the top of the column and projecting fromthe front thereof and overhanging the front portion of the base. Thisconstruction enables the press to be used in automobile factories forstraightening axles, cam shafts, and crank shafts, or other work pieceswhich are placed above the front portion of the base and in the spacebetween said base and the overhanging portion of the head, where thevertically moving ram can have access thereto and the work piece beproperly supported. This press is intended for doing heavy work, forinstance, to exert a pressure of five or more tons, and it will-benoticed that the column is formed separately from the base and from thehead and is of generally triangular cross sectional shape, as shown inFig. 6. One of its sides is disposed back from the'front edge of thebase and parallel thereto, and the bolts or tie rods are arranged at theapices of the triangle, the broad front portion of which extendstransversely across the base, affording a construction which will affordsupport of the head and press generally in a direction transverse tosaid press structure.

\Vhat is claimed as new is:

1. In combination in a power press, a nonrotary reciprocatory ram havingrack teeth, means for operating said ram, comprising planetary gearing,and means under the control of the operator for controllingdifferentially the transmission of power from said planetary gearing tothe ram, substantially as described.

2. In combination in a power press, a nonrotary ram having rack teeth, apinion for driving the same axially, a shaft; geared to the pinion, abull gear wheel rotating about said shaft, power means for rotating saidwheel, a gear keyed on the shaft, a brake drum arranged coaxially withthe shaft and having a hub gear, a planetary gear journalled on the bullgear wheel having teeth engaging the keyed gear and having a second setof teeth engaging the hub gear of the drum. a brake band extendingaround the brake drum, means under control of the operator forrestraining the revolution of the brake drums to varying degrees, byvarying the frictional contact of the said brake band with the saiddrum, to render the planetary more or less effective in rotating thekeyed gear, substantially as described.

3. In combination in a power press, a nonrotary reciprocatm; ram, havingrack teeth,

a pinion meshing with the rack, a shaft in driving connection with thepinion, a gear keyed on the shaft, a bull gear wheel rotating freely onthe said shaft, a drum free to rotate on an extension of said shaft, ahub gear on said drum, a planetary gear journalled on the bull gearwheel having one set of teeth meshing with the keyed gear and anotherset of teeth meshing with the hub gear, a brake band with means underthe control of the operator for applying more or less frictionalresistance to the rotation of the drum with the hub gear, and meansdriving the bull wheel.

In combination in a power press, a non-rotary reciprocatory ram, a headin which said ram is journalled, a pinion mounted in the head andengaging rack teeth on the ram, a shaft also mounted in the said head,gearing between the said shaft and the pinion, a gear keyed on theshaft, a bull gear wheel on a sleeve journalled in said head, a shaftalso journalled in the head and having a pinion meshing with the bullwheel, means for driving the said shaft, a brake drum arranged coaxiallywith the bull gear wheel and having a coaxial hub gear, a plai'ietary onthe bull gear wheel having two sets of teeth meshing respectively withthe keyed gear and the hub gear, and a brake band with connections tothe operator for makin said band bear more or less heavily upon the drumto Vary its rotation at will, substantially as described.

In combination in a power press, a vertically movable ram, a head,gearing for driving the ram, means for controlling in varying degree thetransmission of power from said gearing to the vertically movable ramcomprising a drum mounted in a chamber in the head and connected to saidgearing, a brake band in said chamber engaging the drum, means extendingout through the wall of the chamber for enabling the operator to controlthe frictional resistance applied by the band to the drum, said chambercontaining lubricant held from contact with the vertically movable ram.

6. In combination, in a power press, a frame, a vertically movable ram,gearing for moving said ram downwardly, a spring surrounding said ramcoaxially, a stop or bumper at the upper end of the ram andsubstantially co-axial therewith for limiting its upward movement, meansfor adjusting said stop and means for supporting the adjusting meanscoaxially above the ram, substantially as described.

7. In combination in a power press. a frame, a vertically movable ram,gearing for moving said ram downwardly, a spring surrounding said ramco-axially, a stop or bumper at the upper end of the ram andsubstantially co-axial therewith for limitmg its upward movement, meansfor adj-ustingusaid=stop, asleeve or tubular casing enclos ng the, ram,v spring, and stop, and supporting the adjusting imeans, substantiallyaszdescribed. 8. In combination in apower press, a frame, -a-.venticallymovable ram, gearing for forcing the {ram downwardly, a spring forforcing therl'itlll upwardly, a stop at the upper end, a screw shaft'kcarrying saidstop, a nut for said screw, an extension of the frameforholding the nut gearing for turning the screw to adjust thestop and aconnection to the hand of the; operator for operating said gearing. p'9. In combination in a power: press, a reciprocatory ram,- gearing foroperating thesame, a friction drum and band for controlling-thetransmission of? power from saidgearinglto theram, a rod connected tooneend oft'he band, a lever connected with the rod, means for adjustingthe rod relative to thelever; and means for operating the leyersubstantially as 7 described.

10. In combination in a power press, a vertically. movable, ram,-a headin which it is, guided,- abase, a column between the base and head, saidcolumn-being ashell of tri-' angularform with one ofits sides parallelWith, and located back from the front portion of the :base and back fromthe line of movement of the ram, said head resting upon the column andprojecting therefrom to overliethe front portion of thebase, verticalbolts at the apices of the triangular column, said bolts extendingvup.;from the base, saidbase being trussed or ribbed at itsupper part. I

11,, In combination in apower press, a reciprocatoryram, gearing foroperating the .same, a ,friction' drum and a band for controlling thetransmission of power from said gearing to the ram, arodconnected to oneend zo ftheband a lever connected with the-rod, an adjustable connectionbetween the ,lever. and the foot ,treadle, and adjustable means forlimitingithe upward move: ment, of the, foot treadle, substantially asdescribed. 7 i i r a In testimony whereof, I aflix my signature. V

- 1 QWILLIAM RFOX. Witnesses:

: G AcE, K EPER,

MARIE TUNIsoN.

